Portable electric lamp



I J. H. IRWIN. PORTABLE ELECTRIC LAMP.

(No Model.)

N 29.172, Patented June 3,1890.

SPEUIFIGATIGES' forming part of Application filellJnne 35), 1 381,

To all whom it may concern:

Be it known that I, JOHN H. IRWIN, of ier ton, in the county of Delaware and State of Pennsylvania, have invented certain new ant useful Improvements in Portable Elec in. Lamps, of which the following is ainll, clear and exact description, reference being bad to the accompanying drawing and the letters marked thereon.

My invention consists in the application of electricity for illumination to a portable lamp, and consists, essentially, in combining in one and the same organization an electric lamp and a secondary battery, as hereinatjter described.

'lhe method of arrangement and construction of the constituent parts of the device is such as to render the same compact and light as possible, audio attain this end I employ what is known as the Flame or Fanre secondary battery in connection with my improved incandescent lamp, locating said battery in the base of the structure.

In constructing the secondary battery lean ploy load rolled very thin in order to expose. as much surface as possible and to render the device light-and easy to, handle, and also use a small incandescent lamp in order to admit of the construction of a completed device of such weight as to be easily moved from place to place at the pleasure of the person using it; and my invention involves certain novel and useful arrangement of parts and peculiarities of construction and operation, all of which will be hereinafter first fully described, and then pointed out in the claim. I

In the drawing the figure is an elevation and partial section showing the simplest form of construction of my improved portable lamp and the arrangement of the interior parts.

A is the base and side wall or shell of the battery-holder of the lamp. It may be constructed of hard rubber or any other preferred light non-conducting material, and may be ornamented in any pleasing manneiu B is a battery-cup, composed of thin glass,

Y fitting nicely into the shell A; Itis made very light inv order not to add materially to the weight of the structure.

C is the lead roll, &-c., {the same being cut in section in. order to show the convolntions type; on,

in "he .fign'rs} composing the secondary b attery; same being; ccnstrncted in the wellemployed by those skilled in "no art to which my improvement'relates.

The battery may be of the Flame or Fanre a desired; a dry battery may be E1S(l,illt3 latter being preferable when the iamp is to be snbj ected to considerable motion. A is a disk of snii-aole material fittinginto the base of the lamp and secured thereto by is of screw-threads noon its periphery;

in any other preferred. manner, the same. being so arranged as to support the batteryon when placed Within the shell.

A isa cover or top for the battery-casing. The same is so arranged as to be easily rcmowed when necessary in order to reach the equal to that usually obtained from an ordinary fonrioot gasburner. By using a lamp of this power I am enabled to construct my battery small and. light enough to permit easy removal from place to place wherever the light is required. 3

An insulated wire it forms the connect-ion between oncpole of the battery and lamp and a binding-post. E npon casing A. a is the connection with the other pole of the lamp, terminating at switclrconnection a F is a switch. having connection with the other pole of the battery. liinaiingqoost E has connection with switch-point or shown in charging the battery the poles G G of a dynamo-electric machine are connected to the gosts E "EC By turning the switch to k connection is made between one pole of the battery and n3, throwing the lamp out oi? circuit and establishing electrical connection with the iljlliiliflfillilfilillifiv I 'Wiicn the y snfiiciently charged theswit-eh is tied to a point bet-ween (1. and M, as shown an electric lamp supported by said holder, and conducting-Wires connecting said secondary battery and lamp, for the purpose set 15 forth, substantially as described. In testimony that- I claim the foregoing I have hereunto set my hand in the presence of two witnesses.

JOHN n. IRWIN.

Witnesses:

F. W. IIANAFORD, A. M. PIERCE. 

